The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2006
Filed:
Jun. 17, 2004
Atsushi Ogihara, Kanagawa, JP;
Kunio Yamada, Kanagawa, JP;
Atsushi Ogihara, Kanagawa, JP;
Kunio Yamada, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A photosensor apparatus includes a light receiving element that receives reflection light of light which is illuminated onto a reference pattern image formed on a moving member, a first illuminating unit that enters regular reflection light to the light receiving element, a second illuminating unit that enters diffuse reflection light to the light receiving element, and a light receiving optical system that conducts the regular reflection light and the diffuse reflection light to the light receiving element. Preferably, the light receiving optical system includes a lens, constitutes an image forming optical system that forms the reference pattern image on a light receiving plane of the light receiving element with respect to the diffuse reflection light, and enters to the light receiving plane of the light receiving element only a part of regular reflection light, which is reflected from substantially the same region where the diffuse reflection light is received.